public static ContentFingerprint ComputeGraphSemistableFingerprint(
LoggingContext loggingContext,
PipTable pipTable,
PathTable pathTable)
{
var processSemistableHashes = pipTable.StableKeys
.Select(pipId => pipTable.GetMutable(pipId))
.Where(info => info.PipType == PipType.Process)
.Select(info => info.SemiStableHash)
.ToList();
processSemistableHashes.Sort();
var indicatorHashes = processSemistableHashes.Take(16).ToArray();
using (var hasher = new HashingHelper(pathTable, recordFingerprintString: false))
{
hasher.Add("Type", "GraphSemistableFingerprint");
foreach (var indicatorHash in indicatorHashes)
{
hasher.Add("IndicatorPipSemistableHash", indicatorHash);
}
var fingerprint = new ContentFingerprint(hasher.GenerateHash());
Logger.Log.PerformanceDataCacheTrace(loggingContext, I($"Computed graph semistable fingerprint: {fingerprint}"));
return(fingerprint);
}
}